Key result
Prior heavy-intensity exercise accelerated Phase II Vo2 kinetics during a second exercise bout (mean tau 24s vs 29s, P<0.05), without associated changes in limb blood flow kinetics.
Why the study?
Does prior heavy-intensity exercise improve Vo2 kinetics and limb blood flow during a subsequent bout of heavy exercise in young subjects?
Population
5 young subjects
Comparison
Second bout of 6-min heavy-intensity one-legged… vs First bout of 6-min heavy-intensity one-legged…
Authors
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Prior heavy exercise speeds subsequent VO2 kinetics independently of limb blood flow; challenges perfusion-mediation hypothesis and extends warm-up physiology in young adults.
Does prior heavy-intensity exercise improve Vo2 kinetics and limb blood flow during a subsequent bout of heavy exercise in young subjects?
Absolute Event Rate: 24% vs 29%
p-value: p=< 0.05
Prior heavy-intensity exercise accelerates Vo2 kinetics during subsequent heavy exercise, but this is not mediated by changes in limb blood flow.
Paterson et al. (2005) studied this question. Prior heavy-intensity exercise vs. First heavy-intensity exercise bout was evaluated on Phase II Vo(2) kinetics time constant (tau) (p=< 0.05). Prior heavy-intensity exercise accelerated Phase II Vo2 kinetics during a second exercise bout (mean tau 24s vs 29s, P<0.05), without associated changes in limb blood flow kinetics.
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